Lock for car doors



Jan. 8, 1957 K. F. NYSTROM 2,776,855

LOOK FOR CAR DOORS Filed July 27, 1951 2 Sheets-Sheet l IN VEN TOR. 47 JZZv-ZIAQam BY I Jan. 8, 1957 NYSTROM 2,776,855

LOCK FOR CAR DOORS Filed July 27, 1951 2 Sheets-Sheet 2 IN V EN TOR.

LOCK FOR (IAR DOORS Karl F. Nystrom, Chicago, Ill.

Application July 27, 1951, Serial No. 238,966

6 Claims. (Cl. 292-284) This invention relates to sliding railway car doors and more particularly to the construction of a lock for holding said doors closed.

Practically all doors and door frames for railway cars are now provided with at least front and rear door seals which require a forceful engagement of the cooperative parts of said seals so that they may properly function in excluding dust, dirt, etc., from sifting into the car when the door is closed.

An important object of the invention, therefore, is the provision of a novel locking device for such sliding car doors wherein the parts of the lock are capable of exerting a closing force upon the door to insure the door being brought to a fully closed position.

Other objects and advantages of the invention will appear in the following description thereof.

Referring now to the accompanying drawing forming part of this application and wherein like reference characters indicate like parts:

Figure l is a side elevation of a portion of a railway car sliding door and adjacent door frame illustrating the improved lock associated therewith;

Figure 2 is a section on line 2--2 of Fig. 1;

Figure 3 is a side elevation of Fig. 1;

Figure 4 is a section on line 4-4, Fig. l; and

Figure is a section on line 55 of Fig. 1.

In the drawings a portion of the sliding door is shown at 1, which may be of any acceptable design, on the forward vertical edge of which is mounted the usual spark strip 2 having an arcuate terminus 3 which engages within a similarly shaped vertical margin 4 of the cooperative strip 5, secured to the outer face of door post 6. Spark strips 2 and 5 extend from top to bottom of the door and door post respectively.

A somewhat reverse S-shaped staple 7 is provided of round material, having an arcuate portion intermediate its ends, a straight flattened portion 8 at one end which is welded to the forward margin of the door, and. a straight portion 9 at the other end which is welded to the spark strip 2. A short piece of round bar 10 is welded within the arcuate terminus 3 of the spark strip 2 to reinforce that portion of said strip adjacent the staple 7.' Spark strip 5 is provided with a portion 11 which is.

welded fiatwise against flange 12 of the door post. Numeral 13 indicates a margin of the side sheathing of the car, which margin is likewise welded to flange 12 of the door post.

The locking device comprises an angle having a short leg 15, welded as at 16, to flange 11, of the spark strip 5, and which extends normally from said flange so that it abuts the arcuate terminus 4 of said spark strip and is welded to said terminus, as at 17. The other leg 18 of said angle is provided with a pair of vertically alined holes 19. An angular bracket casting is provided having a short narrow leg 20, the outer end of which is welded, as at 21, to the side sheathing 13, and another leg 22 which overlaps the leg 18. The leg 22 is provided with States Patent 0 i a hole 23 therein while leg 18 is provided with a hole 19, as aforesaid. The holes 23 and 19 are aligned for the passing of rivets 24 for holding the angles together. Projecting outwardly from leg 22 is a shelf-like member 25 having a key-hole like opening26 therethrough. Before the staple 7 is welded to the edge of the car door 1 a hasp 27, having a semi-circular end 28 with an axial hole 29 therethrough, is applied to said staple so that the hasp is then pivotally attached thereto. This hasp 27 has a lug 30 projecting outwardly from one side thereof and immediately adjacent the lug 30 there is provided an elongated opening 31 transversely therethrough, which opening is of a size and width to slip over the shelf 25 when the door is in closed position, as shown in Figs. 1 and 2.

Projecting outwardly from the leg 22, and spaced above the member 25, is a shelf-like flange 32 which has a narrow vertical slit 33, transversely therethrough, which slit extends downwardly through said leg 22, as at 34, below said flange 32. A locking pin 35, formed of flat bar material, having an enlarged semi-circular head portion 36, terminating in an overhanging portion 37, is provided for application through openings 33 and 26 over the hasp 27, so that when said locking pin is thus applied the door is held securely closed and cannot be opened until the locking key is withdrawn from the opening 26, and the hasp 27 raised from member 25. The overhanging portion 37 rests upon the shelf-like flange 32 when in position, as shown in Fig. l.

The lower end of the locking pin 35 is widened, as at 38, to an extent that it cannot be withdrawn through opening 33 when the pin is lifted for releasing the hasp 27. Consequently, in assembling, the locking pin is placed in position before the locking bracket is riveted by rivets 24 to the leg 18 of the angle,.which leg 18, as seen in Fig. 3, overlaps opening 33. Thus in operation the locking pin cannot become lost. The enlarged upper end 36 is provided so that the pin 35 cannot move backwardly sufliciently for overhanging portion 37 to disengage shelf 32.

locking pin, which slit registers with a corresponding slit 40 through an adjacent outwardly extending wall 4510f the bracket, so that a car seal may be woven through said.

slits 39 and 4%, when the door is to be sealed in closed position.

In locks of this character it is essential that some mean be provided to insure that the door spark strip 2 at the forward edge of the door tightly engages the cooperative strip 5 on the door post, because when the door is closed.

manually it may not close sufficiently for the hasp 27 to be engaged over the projection 25. Therefore, I have provided a wedging latch 45, which is of rigid flat material, having a head portion 46 which overhangs the body portion on all four sides and provides a striking surface for hammering the latch down. One side edge 47 of this wedging latch is straight, whereas the opposite side edge is provided with two parallel spaced inclined portions 48, adjacent the head 46, and 49 adjacent the bottom of the latch. The bracket is provided with a four sided housing portion 59 which is cast integral with flange 22, and when originally formed, is open at both top and bottom. The lower portion of wall 51 of this housing is inclined, as at 52, in the same degree as inclined portion 43-9. Housing 51) is also formed integral with one end of shelf 32 and occurs above the hasp 27 when in position, as shown in Fig. l. The latch bracket is also provided with a shorter housing 53 also cast integral with flange 22 and open at top and bottom and with one wall 54 inclined, as at 55, to the same degree as portion 49. The rear walls of these housings are in thickness substantially equal to the thickness of the hasp 27 so Patented Jan. 8, 1951 A slit 39 is provided through the widened end of the that when the locking latch is placed in these housings it willoverlie the hasp 27 practically adjacent the lug 3t of the hasp. After the latch 45 is placed in these housings, as shown in Figwl, a-block 56: is weldedacross the topiof sideSl of housing 50' and-the-margins of the adjacent side walls. The inner: edge 57 of this block is also inclined' to the same degree as portion 48 of the latch. When this block is welded in place as described thelatch 45f obviously cannot be inadvertently removed and becomelost.

Whenthe parts are assembled as above described, the

car door closed, the hasp appliedover the member 25, a

forcing downwardly of the-latch bar 45 will cause the inclined, surfaces 48 and 57 and 49 and 55 to respectively,

engage, andas surfaces 57 and55 are forced down, such action w-illcause the wedging latch to move laterally against projection 30, thereby pulling the door completely shut with the respective spark strips Zand tightly engaged; Then the locking pin 35 is lowered into position.

While I have described my invention incertain preferred embodiments I realize that modifications may bemade and I desire that it be understoodthat no limitations upon my invention are intended other than may be imposed by the scope of the appended claims.

I claim:

1. A lock for a sliding doorcomprising a pair of coacting angle members adapted to be secured to a stationary member associated with a door, said angle members having overlapping portions one of which has an outwardly protruding shelf and inclined side surfaces, said last mentioned angle member constituting the front plate of a bracket, a latch slidably supported by said bracket, means for restricting the movement of said latch within the confines of said bracket, a hasp swingablymounted on the door, a locking pin movably supported by said bracket, said shelf having an aperture through which said locking pin extends, said locking pin being slidably mounted in said bracket in spaced substantially parallel relation to said latch and'engageable with said hasp for confining said hasp, and means for restricting the movement of-said locking pin within the confines of said bracket, said hasphaving an outwardly projecting embossment slidingly engageable with one side of said latch,-the opposite side of said latch having coacting, inclined surfaces cooperating with said inclined surfaces on said bracket to provide a forced pulling movement on said-hasp, said hasp being adaptedto receive said protruding shelf in said bracket within the path of said locking pin.

2. A look for a sliding door comprising a pair of coacting angle members adapted tobe securedto a stationary member associated with a door, said angle'members having overlapping portions one of which has an outwardly protruding shelf and inclined-surfaces, said last mentionedangle member constituting the front plate of a bracket, a latch slidably supported by said bracket, means for restricting the movement of said latch within the confines of said bracket, a hasp swingably mounted on the door, a locking pin movably supportedby said bracket, said locking pin being slidably mounted in said bracket in spaced substantially parallel relation to said latch and engageable withsaid hasp for confining said hasp, and means for restricting the movement of said locking pin within the confines of said bracket, saidhasp having an outwardly projecting embossment slidingly engageable with one side of said latch, the opposite side ofsaidlatch having coacting inclinedsurfaces cooperatingwith said inclined surfaces on said bracket to provide a forced pulling movement on said hasp, said hasp having an opening therein for receiving said protruding shelf in said bracket with freedom of movement in excess of the movement'of said hasp, said locking pin being linearly slidable in saidbracket-in apath disposed in spaced'sub stantiallyfiparallel relation to the path ofmovement of latch slidably supported by said bracket, means for restricting the movement of said latch within the confines of said bracket, a hasp swingably mounted on the door, a locking pin supported by said bracket, said locking pin being slidably mounted in said bracket in spaced substantially parallel relation to said'latch and engageable with said hasp for confining said hasp, and means for restricting the movement of said locking pin within the confines of said bracket, said hasp having an outwardly projecting embossment slidingly engageable with one side of said 'latch, the opposite side of said latch having inclined surfaces cooperating with said inclined surfaces on said bracket to provide a forced pulling movement on said hasp, said hasp being movable to a position encircling said protruding shelf in said bracket with freedom of movement in excess of the movement of said hasp, said locking pin being engageable with'said protruding shelf in overlapping relation with said hasp, said locking pin having'enlarged portions at either end for restricting the movement'ofsaidlocking pin within the confines of said bracket.

4. A lock for a sliding door comprising a pair of coacting angle members ad'apted'to be secured to a stationary member associated with a door, said angle members having overlapping portions, one of which has an outwardly protruding shelfand inclined surfaces, said last mentionedangle memberconstituting the front plate of a bracket, a latch slidably supported by said bracket, means for restricting the movement of said latch within the confines of said bracket, a hasp swingably mounted on the door, a locking pinsu'ppo'rtedby said bracket,said shelf having an aperture through which said locking pin extends, said locking pin being slidablyrnounted on said bracket in spaced substantially parallel relation to said latch andengageable with said hasp for confining said hasp for movement in a path'perpendicular to both said locking pin and said latch, said hasp having an outwardly projecting embossment slidingly engageable with one side of said latch, the opposite side of said latch having in clined surfaces cooperating with said inclined surfaces on said bracket to provide a forced pulling movement on said hasp, said hasp being adapted to receive said protruding shelf'in said bracket with freedom of movement in excess of the movement of said'hasp, said latch slidingly overlappingsaid hasp,-and means for restricting the movement of said locking pin to the confinesof said bracket.

5. A lock for a sliding door comprising a bracket secured to a door framing member adjacent a door, said bracket including an outwardly protruding shelf and inclined surface portions, 2. locking pin mounted in said bracket and movable in a substantially vertical path therein, said shelf having an aperture through which said locking pin extends, a latch slidably supported by said bracket for movement in a substantially vertical path, means for restricting the movement of said latch Within the confines of said bracket, a swingably movablehasp mounted on a coacting door and movable toward and away from said bracket and extending on an axis spaced from and substantially perpendicular to the axes of said locking pin and said latch, means for restricting the movement of said locking pin within the confines of said bracket, said hasp having an outwardly projecting embossment slidably engageable withone side of said latch, the opposite side of said latch having inclined surfaces cooperating with said inclined surfaces on saidbracket to provide a forced pulling movement on said hasp, said hasp being adapted to surround said protruding shelf on said bracket with freedom of movement in excess of the movement of said hasp, said locking pin being engageable with said protruding shelf in overlapping relation with said hasp, said locking pin having enlarged portions at either end for restricting the movement of said locking pin within the confines of said bracket.

6. A lock for a sliding door as set forth in claim 5 which includes means for sealing said locking pin with respect to said bracket comprising alignable passages formed in said bracket and in said locking pin for the passage of an interconnecting fastening band in a position below the protruding shelf substantially in horizontal alignment with the lower end said latch.

References Cited in the file of this patent UNITED STATES PATENTS 

